darifenacin vs erythromycin
PlainMeds reviewed this comparison against our methodology in August 2026. It places FDA and CMS record fields side by side, without recommending either medication.
Side-by-side comparison of darifenacin and erythromycin. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
No dosing adjustments are recommended in the presence of moderate CYP3A4 inhibitors (for example, erythromycin, fluconazole, diltiazem and verapamil) [see Dosage and Administration (2) and Clinical Pharmacology (12.3) ] .
Enablex
E-Mycin, Ery-Tab
Darifenacin (Enablex) is a medicine that helps control an overactive bladder. It reduces the feeling of needing to go to the bathroom so often.
Erythromycin Topical Solution is a medicine that you put on your skin to treat acne. It contains an antibiotic to help clear up your skin.
This medicine treats overactive bladder. If you have overactive bladder, you may feel a sudden need to urinate. You may also urinate more often than normal, or leak urine.
Erythromycin Topical Solution treats acne vulgaris. This medicine helps to reduce acne on your face, neck, shoulders, chest, and back. It works by fighting the bacteria that cause acne.
Darifenacin blocks certain receptors in the bladder. These receptors cause the bladder muscles to contract. By blocking them, the medicine helps the bladder relax and hold more urine.
Erythromycin is a macrolide antibiotic. It works by stopping the growth of bacteria. This helps to reduce inflammation and clear up acne.
- • Dry mouth
- • Constipation
- • Headache
- • Upset stomach
- • Nausea
- • Peeling
- • Dryness
- • Itching
- • Redness
- • Oily skin
- Peripheral Swelling 91
- Herpes Zoster 83
- Pneumonia Viral 79
- Anaemia 59
- Arthralgia 59
- Drug Hypersensitivity 4,088
- Nausea 1,271
- Vomiting 1,121
- Diarrhoea 1,069
- Dyspnoea 1,023
If you have bladder problems that cause you to have trouble urinating, use darifenacin with caution because it could make it harder to urinate. Use caution if you have stomach or bowel blockage, as this medicine can make it worse. Darifenacin may cause sleepiness, so do not drive or operate heavy machinery until you know how it affects you. Angioedema (swelling of the face, lips, tongue, and/or throat) has been reported with darifenacin and can be life-threatening.
You should not use this medicine if you are allergic to any of its ingredients.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if darifenacin will harm your unborn baby. Talk to your doctor if you are breastfeeding or plan to breastfeed, as it is not known if darifenacin passes into breast milk.
It is not known if erythromycin topical solution can harm an unborn baby. Talk to your doctor if you are pregnant or breastfeeding.
Also Compare, Nearby Drugs
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How to Read This darifenacin vs erythromycin Comparison
darifenacin is classified in the Anticholinergic (Overactive Bladder) drug class, while erythromycin sits within the Macrolide Antibiotic class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, darifenacin has 371 submissions while erythromycin has 8,572. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to erythromycin is a moderate blocker of the enzyme that clears darifenacin from your body, but it does not significantly change the drug's effect.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for darifenacin or erythromycin.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.